Specifications

SYNC I/O Guide30
LTC Output Level
This control adjusts the analog audio level of
the SYNC I/O LTC output, from –24 dBu to
+9 dBu.
Freewheel Duration
This control sets the period of time for which
SYNC I/O will continue to supply positional ref-
erence data after an external source is inter-
rupted or stopped (also referred to as Time Code
Freewheel in Pro Tools).
Video Format
This control selects the format (NTSC or PAL)
for both the incoming and outgoing video sig-
nals.
◆ NTSC is used in North and South America, Ja-
pan, and certain other parts of the world.
◆ PAL is used in most of Europe, Asia, and Af-
rica. Users of SECAM video (for France, Russia,
and certain other parts of the world) should se-
lect PAL.
VITC Read Lines
This control determines which line pair of in-
coming video signal is used for the VITC source.
When set to Auto, SYNC I/O will search for the
first valid line pair automatically. Alternatively,
this value can be set to specific VITC line pairs.
VITC Generate Lines
This control determines the line pair of the out-
going video signal onto which SYNC I/O inserts
VITC. Normally, this should be left at the de-
fault (and preferred) setting of 14/16.
VITC Insertion Enabled
When selected, VITC will be inserted into the
outgoing video signal—assuming that a video
signal is present at a SYNC I/O video input, and
that SYNC I/O is in a valid mode for inserting
VITC. The only invalid positional reference
modes are VITC or Auto Switch LTC/VITC.
SYNC I/O can’t read VITC and generate new
VITC at the same time.
Pitch Memory Enabled
When selected, SYNC I/O will remain at a pitch
(sample rate) that corresponds to the last known
incoming time code speed. When deselected,
SYNC I/O will revert to the selected sample rate.
If Pitch Memory is disabled and the selected ex-
ternal clock reference is not available, then
SYNC I/O will revert to the nominal, selected in-
ternal sample rate setting.
Idle MTC Enabled
Controls MTC Output during idle (play
stopped). When enabled, MTC is continuously
output. When not enabled, MTC output is
muted when playback is idle. See “MTC Output
and Idle Muting” on page 53 for details.
Dub Window
Settings for SYNC I/O character generator/win-
dow dubbing features. (These controls are also
available from within the Pro Tools Peripherals
dialog.) Complete Window Dub instructions are
provided in the section “Generating a Window
Burn” on page 53.